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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-5872) Make UDAFs such as GenericUDAFSum report accurate precision/scale for decimal types
Date Sat, 23 Nov 2013 18:53:35 GMT

     [ https://issues.apache.org/jira/browse/HIVE-5872?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xuefu Zhang updated HIVE-5872:
------------------------------

    Status: Patch Available  (was: Open)

> Make UDAFs such as GenericUDAFSum report accurate precision/scale for decimal types
> -----------------------------------------------------------------------------------
>
>                 Key: HIVE-5872
>                 URL: https://issues.apache.org/jira/browse/HIVE-5872
>             Project: Hive
>          Issue Type: Improvement
>          Components: Types, UDF
>    Affects Versions: 0.12.0
>            Reporter: Xuefu Zhang
>            Assignee: Xuefu Zhang
>         Attachments: HIVE-5872.patch
>
>
> Currently UDAFs are still reporting system default precision/scale (38, 18) for decimal
results. Not only this is coarse, but also this can cause problems in subsequent operators
such as division, where the result is dependent on the precision/scale of the input, which
can go out of bound (38,38). Thus, these UDAFs should correctly report the precision/scale
of the result.



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